does it worth it to change the cpu and motherboard ? i mean i just want to play every game on ultra setting with 1080p and have +40 fps
so should i change the mb and cpu too ? or that does not make much difference ?
and do you think i should add more RAM ? because when i play high end games like metro my RAM only load like 60%
and what do you mean by PSU ?! ( i am not very expert about these stuff )
Ok, for now just buy the GTX 690(GPU), play the games you want to play, see the results, if it suits you, no need to buy CPU and MB right now, if it doesn't then you have the liberty to buy components any time, and they would be compatible with your GPU for sure.
As I said earlier some modern day games will require a faster CPU, and it would make a difference. Just check with the link I provided for games, you will know. And see the "recommended" tab for a better understanding.
About RAM : you could increase it by 2 GB max, so it will be 8 GB of RAM, and you will not need more than that. But its up to you.
PSU = Power Supply Unit, in other words SMPS = Switch Mode Power Supply. So just make sure you own a good rated PSU, you will need it badly.
So the conclusion will be just buy the GPU play with it, if you are not satisfied with its results then buy new components. We will be here to help you with new components, of course if you need it. Good luck. May I help you with something else.